2 IntroductionShrimp farming has become competitive and as such the technology utilized needs to be efficient in all aspects – productivity, quality, sustainability, bio-security and to be in line with market demand.BFT (Biofloc) system is at present highly sought technology for Pacific white shrimp culture due to high efficiency, productivity, sustainability and with lower FCR. The basic system of bio-floc technology was given by Avnimelech (2000, 2005a&b). The system was successfully applied in commercial culture of shrimps by McIntosh (2000a,b & c, 2001), McNeil (2000), Nyan Taw (2005, 2006, 2009), Nyan Taw & Saenphon Ch. (2005); Saenphon Ch. et.al. (2005). BFT in combination with partial harvest was presented at WA 2009 in Veracruz, Mexico and on Potential of BTF at Asia Pacific Aquaculture 2009 in KL by Nyan Taw (2009). Recently, Avnimelech (2009) published a book entitled “Biofloc Technology: A Practical Guide Book” . Very recently Nyan Taw (2010) published an article in GAA on expansion of biofloc technology in white shrimp farms. Studies on raceway nursery and super intensive zero water exchange systems were carried out by Somacha (2002 & 2009).

31 Development of BFT (Productivity)NT- Advised by long visitsNT – Managed at siteNT – Advised by short visitsYA -Advised byRM- Managed at siteAccording to Shrimp News International (2006) No one knows how many shrimp farms are employing the bio-floc technology. The best examples of the of farms that have implemented the new technology are: 1. Belize Aquaculture, Ltd., in Belize. 2. OceanBoy Farms in Florida, USA, and 3. PT Central Pertiwi Bahari in Indonesia.

32 Advantages/ Disadvantages1. Bio-security very good (from water) – to date WSSV negative using the system.2. Zero water exchange – less than 100% exchange for whole culture period.3. Production (Carrying capacity): 5-10% better than normal system4. Shrimp size bigger by about 2.0 g than normal system5. FCR low – between 1.0 to 1.3 (without GP)6. Production cost lower by around %.Disadvantages1. High energy input – paddlewheels 28HP/ha.2. Power failure critical – maximum one hour at any time (better zero hour failure)3. Full HDPE lined ponds – minimum semi-HDPE lined4. Technology similar but more advance – need to train technicians

34 AcknowledgementsThe author would like to give sincere thank to Dr. Shahridan Faiez (CEO) and Mr. Christopher Lim (COO), Blue Archipelago for their interest and continued support .The staff and members of Blue Archipelago, Malaysia for their diligence and hard work to make this presentation possible.